What is an elf?

An elf is a humanlike entity that has slightly pale skin, slightly pointed ears, who occasionally faint, still have middle age weapons, and are much more shorter than humans.

Some elves are as tall as humans; and they could be from 4" to 6". But most elves are about 4" tall.

Elves included in Tolkien's books were described as beautiful, tall, wise, yes they had the pointed ears, and immortal.